:root {
    --primary-color: #1b365d;
    --secondary-color: #4a777a;
    --bg-color: #f4f7f6;
    --border-color: #cccccc;
    --error-color: #d9534f;
    --warning-bg: #fff3cd;
    --warning-text: #856404;
}

body {
    font-family:
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        sans-serif;
    background-color: var(--bg-color);
    color: #333;
    line-height: 1.5;
    margin: 0;
    padding: 20px;
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
    background: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.form-header {
    text-align: center;
    margin-bottom: 25px;
}

.form-header h1 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.sub-header,
.contact-info {
    font-size: 0.85rem;
    color: #555;
    margin: 2px 0;
}

.form-header h2 {
    font-size: 1.1rem;
    margin-top: 15px;
    margin-bottom: 2px;
}

.form-header h3 {
    font-size: 0.95rem;
    color: var(--secondary-color);
    margin-top: 0;
}

.notice-box {
    background-color: #eef4f8;
    border-left: 4px solid var(--primary-color);
    padding: 12px 15px;
    font-size: 0.85rem;
    margin-bottom: 25px;
}

fieldset {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 20px;
    margin-bottom: 25px;
    background: #fafafa;
}

legend {
    font-weight: bold;
    color: var(--primary-color);
    padding: 0 10px;
    font-size: 1.05rem;
}

.note {
    font-size: 0.85rem;
    color: #666;
    margin-top: -10px;
    margin-bottom: 15px;
}

.field-hint {
    font-size: 0.85rem;
    color: #555;
    margin-bottom: 10px;
}

.terms-text {
    font-size: 0.85rem;
    color: #444;
    margin-bottom: 15px;
    line-height: 1.4;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

@media (min-width: 600px) {
    .grid-2 {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 15px;
}

label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.95rem;
    box-sizing: border-box;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 4px rgba(27, 54, 93, 0.3);
}

.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 10px;
}

@media (min-width: 600px) {
    .checkbox-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.checkbox-grid label {
    font-weight: normal;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 8px;
    background: #ffffff;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.checkbox-grid label:hover {
    border-color: var(--primary-color);
    background: #f0f4f8;
}

.upload-box {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px dashed var(--border-color);
}

.warning-banner {
    background-color: var(--warning-bg);
    color: var(--warning-text);
    font-weight: bold;
    text-align: center;
    padding: 10px;
    border-radius: 4px;
    margin-top: 15px;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.error-message {
    color: var(--error-color);
    font-size: 0.8rem;
    margin-top: 3px;
    display: none;
}

.invalid input,
.invalid textarea {
    border-color: var(--error-color);
}

.invalid .error-message {
    display: block;
}

.form-actions {
    text-align: center;
    margin-top: 20px;
}

.btn-submit {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.btn-submit:hover {
    background-color: #12243e;
}